ashworth



(No Model.) 3 Sheets-Sheet-l.

G. & ASHWORTH.

APPARATUS FOR TRUING BARS FOR GARDING ENGINE FLATS. No. 398,018. Patented Feb. 19, 1889.

. INVENTORS N. PETERS. PIMoUWGgr-iphcn Wnhingtwn. D.

( MOdBL) 3' Sheets-Sheet; 2. G. 85 E. AsHwoRTH. APPARATUS FOR TRUING BARS FOR GARDING ENGINE FLATS.

No. 398,018. PatentedFeb. 19', 1889.

N. PETERS, Pinch-Lithographer, W-hh'mgflll. 0.6.

(No Model.) 3 SheetsSheet- 3.

G. & E. ASHWORTH. APPARATUS FOR TRUING BARS FOR GARDING ENGINE FLATS. No. 398,018. Patented Feb. 19, 1889.

IN VE NTO R s.

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ll'rrnn STATES ATENT Grrrcn.

GEORGE ASI-llVORTI-I AND ELIJAH ASHNVORTH, OF MANCHESTER, COUNTY OF LANCASTER, ENGLAND.

APPARATUS FOR TRUING BARS FOR CARDlNG-ENGINE FLATS.

SPECIFICATION forming part of Letters Patent No. 398,018, dated February 19, 1889. Application filed February 23, 1888- Serial No. 264,974- (No model.) Patented in England April 20, 1886, No. 5,452. i

To all whom it may concern:

Be it known that we, GEORGE ASHWORTH and ELIJAH ASHWORTH, of the firm of Ashworth Brothers, subjects of the Queen of Great Britain and Ireland, and residing at Manchester, county of Lancaster, England, have invented certain Improvements in Apparatus for Truing Bars for Oarding-Engine Flats, (for which we obtained a patent in Great Britain, No. 5,452, dated April 20, 1886,) of

which the following is a specification.

Our invention relates to the metal bars to which the card-clothing is attached to form the traveling flats used in carding-engines, as

I 5 is well understood. It is of great importance that the surfaces which are in sliding contact with the curved guides when the flats are at work shall be true in form, and that the two surfaces at the ends of a bar shall truly 2o correspond and bear a true relation to the finished surfaces on the back of the flat, and also that such surfaces shall correspond throughout the chain of flats. To form or make true the aforesaid surfaces, which slide upon the 2 5 guides, we employ two grinding-wheels,which are carried by one shaft and are fixed or adjusted at such a distance apart as that the two surfaces at the ends of abar can be ground by the same operation.

3 Our invention will be best understood when described \n'th reference to the accompanying drawings.

Figure 1 represents a side elevation of our improved machine for grinding the curved sur- 3 5 faces upon both ends of a flat-bar at one operation. Fig. 2 is a front elevation of the same machine. Fig. 3 is a plan of the parts which carry the fiat-bar and present it to the two grinding-wheels. Fig. 4 shows the method of clamping or holding the flat-bar. Fig. 5 is a front or face view of a portion of one of the two grinding-wheels. Fig. 6 is a sectional view taken on a plane at right angles to the plane of Fig. 5.

In Figs. 1 and 2,A A are two grinder-disks, which are secured upon a spindle mounted to revolve in bearings which are formed in pedestals l), fixed upon the under framing, o, of the machine. The radius of each of the two grinders a is made to correspond with the radius of the flexible bends or curved guides upon which the flats which have to be ground are to travel, so that the said grinderswould produce curved surfaces to correctly fit upon such bends or guides. The grinder-spindle is actuated by means of a driving-belt acting upon a pulley fixed upon the spindle, as will be well understood. Upon the two side pieces of the framing c are fixed two beds,

(Z, which are planed to receive sliding carriages e, which appear also in plan in Fig. 3. These two carriages are connected together by means of a cross-piece, f, which we will term the bar-carriage, and which is adapted to carry the flat-bar and to hold it in a correctly-adjusted position during the grinding operation.

In Fig. 3, g represents a flat-bar in such a position. The method we have adopted for holding the bar is represented on a larger scale in Fig. at. The flat-bar rests upon a planed surface 011 the bar-carriage and bears at each end against a back-rest consisting of a hardened-steel plate, 77,, fixed to a part, i, which is bolted to the top of the bar-carriage. 7 5 The back-rest h is so shaped or fixed as that the nearly-vertical face is inclined from the true vertical to such an extent as that when the prepared surfaces formed 011 the back of the fiat-bar at its ends are pressed against the said plates the flat-bar will be presented to the grinders in such a position as that the face of the bar to which the cards are to be fixed will be inclined to a suitable extent from what would be a right angle with a radial from the grinder-axis, in order that the cards when at work may have their ordinary working relations with the main cylinder, as will be understood by the practical operator. The flatbar is pressed against the two back-rest plates 0 h by means of springs 70. One of these springs is clearly indicated in Fig. 4. The bar-carriage is acted upon by means of two screws, Z, which engage with nuts attached to the parts 6. Upon the outer end of each screw is fixed 5 a bevel-wheel, which gears with a bevel-wheel upon a cross-shaft, m, which serves to connect together the two screws, so that when the said shaft is turned by means of a hand-wheel or handle the two screws revolve in unison, as is well understood. The peripheries of the two grinders consist of copper or soft-metal ribbons or rings, to which emery or grinding powder is applied; or the said peripheries are otherwise composed, as will be mentioned hereinafter.

'lhemachi ne operates in the following manner: The flat-bar to be treated is dropped into place to rest upon the flat-carriage with its ends between the springs 7c and the back-rests 71, as indicated .in Fig. l. The shaft m is then turned in the direction which will move the flat-bar into contact with the grinders, which then operate upon the bar to grind the required curved. surfaces. The forward move ment of the bar-carriage is continued until its motion is arrested by adjustable stops. One of these stops is seen at '21. n, Fig. 1, and consists of a screw which engages with a screwthread formed in a bracket which is east upon or fixed to the bed (Z. Such stops being correctly adjusted, a number of bars can be ground to be all equally acted upon. The barcarriage and the method of mounting and actuating the same may be modified as, for example, the carriage may be mounted upon a single bed and be acted upon by a single screw; but we prefer the indicated arrangement.

In Fig. 1 an arrangement is indicated in the left-hand portion of the drawings for grindin g the back surfaces of the flat-bars by means of the same grinders. A bracket, 0, is mounted to slide upon a bed fixed to the side a of the under framing on each side of the machine. Each bracket is planed to receive a sliding bar-carriage, p, which is acted upon by two connected screws, as in the case of the other bar-carriage, g; but in the case of the carriage p the sliding movement is at right angles to a radial from the grinder-axis. The two brackets are also acted upon by means of connected screws, so that the bar-carriage can be moved in a straight line parallel with a radial from the grinder-axis. It will be clearly seen that if abar is clamped, secured, or held in position upon the carriage, and the latter moved up and downv to a suitable extent with the parts to be ground in contact with the grinders, true :tlat parallel surfaces can be formed on the bars in the required places. Inplace of these parts just described, we might apply an arrangement corresponding with that to the right hand, so that two bars could be operated upon to produce curved surfaces at the same time.

Figs. 5 and (3 in Sheet 3 illustrate the method we have adopted in the construction of the grinders. To the grinder-disk A we bolt metal holders 1', which are each adapted to hold a block or plate, .9, of consolidated emery. Each holder is secured to the face of the disk by means of bolts which pass through slots in the said holder, and the holder is adapted to be adjustable radially within the limits of the said slots to compensate for the wearing of the grinders. In the example this adjustment is elfected by means of screws t, which pass through a projecting ring, u, formed upon the disk. Each block or plate of emery is clamped or secured to the holder by means of belts or of suitable clamping parts, and is molded at both ends to a curved shape suit able to the requirements, so that when one end has become worn down the blocks can be reversed so as to bring the other end into use. '0 also, in some or in all cases, make the said blocks adjustable in or upon the holders. It will be understood that the holders, with the blocks or plates of emery, are arranged in close order entirely around the axis of the disk A, so as for all. practical purposes to constitutea circular grinder. hen we have adjusted the holders so that the outer curved ends of the blocks project to aboutan equal extent from the axis of the disk and a little beyond the radial length of the flexible bend hereinbefore referred to, we revolve the disk and turn down the ends of the blocks by means of a diamond tool until we have produced a grinder of the required diameter. \Ve have found it to be necessary to balance the weight of the holders and grinding-blocks by means of balance-weights r, Fig. 6, on the back of the disk.

o do not confine ourselves to any particular formation of grinder, nor to the use of consolidated emery, nor of the soft-metal periphery or lap surface hereinbefore mentioned, so long as two circular disks or wheels proportioned in diameter to the requirements as set forth are formed or adapted to grind, lap, cut, or file the metal at the two ends of the bars by simultaneous concerted action.

Having now described our invention, we declare that what we claim is 1.. In an apparatus for acting upon cardingengine flat-bars to form or finish the curved surfaces which slide upon the flexible bends or curved guides, two revolving grinding-surfaces, the radins from the axis of motion to' the griiiding-surfaces eorresponding with the radius of the flexible bends or curved guides of the carding-engine, in combination with a bar-carriage for holding the Ilat-bar and con neeted feed-screws for moving ittoward the grinders to obtain uniformity at the two ends of the bar, substantially as set forth.

2. In a machine for forming the curved surfaces or working-faces on the two ends of a carding-engine flat-bar, two circular grinders fixed upon one shaft, each grinder being constructed by attaching grinding blocks or plates to revoluble disks or carriers and by turning the projecting edges of such blocks or plates to make the periphery of the grinder correspond in curvature with the bends or guides upon which the flats are to travel, substantially as set forth.

In a machine for grinding or cutting the curved surfaces upon the ends of carding-engine flat-bars, the back-rest h, having the indicated angular position, the bar-carriage f, the two carriages e e, mounted in slides and coupled together by means of the screws H, In testimony whereof we have signed our the cross-shaft and bevel-gearing m, and the names to this specification in the presence of adjustable stops n, in combination with two two subscribing witnesses. revolving grinders having about the same ra- 5 dius as the bend or guide upon which the flats GEO. ASHWORTH.

are to slide, and fixed upon a shaft at a disi ELIJ AH ASHYVORTII. tance apart corresponding to the distance apart of the two curved surfaces which are to Witnesses: be formed upon the flat-bar ends, substan- DAVID FULTON,

1o tially as set forth. JOSHUA ENTWISLE. 

